Hints: Mediterranean Atlantic caustic labyrinth

As the sun beat down, something like 4,000 cubic kilometers of water evaporated from the Mediterranean surface every year. And with no Atlantic water to replenish it, the Mediterranean dried out. In just a thousand years, it became a desert basin of salt pans and caustic lakes. The rivers that once fed the Mediterranean cut deeper and deeper into the rock, chasing the dropping shoreline and forming a labyrinth of dramatic gorges.

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